sitespeed.io/lib/support/helpers/scoreLabel.js

sitespeed.io is an open-source tool for comprehensive web performance analysis, enabling you to test, monitor, and optimize your website’s speed using real browsers in various environments.

export function scoreLabel(value = 0) {
  if (value > 90) {
    return 'ok';
  } else if (value > 80) {
    return 'warning';
  }
  return 'error';
}